서지주요정보
다방향으로 입체 보강된 복합재료의 기계적 물성치 예측 = Prediction of mechanical properties for spatially reinforced composites
서명 / 저자 다방향으로 입체 보강된 복합재료의 기계적 물성치 예측 = Prediction of mechanical properties for spatially reinforced composites / 유재석.
저자명 유재석 ; Yoo, Jae-Seok
발행사항 [대전 : 한국과학기술원, 2002].
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등록번호

8013334

소장위치/청구기호

학술문화관(문화관) 보존서고

DAE 02004

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초록정보

In this study, the stiffness and the strength of spatially reinforced composites (SRC) are predicted by using superposition of a rod and matrix stiffnesses in an arbitrary direction. To confirm the predicted values, the material properties of SRC are measured. The predicted values from the volume average of stiffness matrix are consistent with the tested values in a rod direction, but are inconsistent in an off-rod direction while reverse is true for the volume average of compliance matrix. Therefore, the harmony function from superposition of stiffness and compliance matrix is introduced. The predicted values from the harmony function are consistent with the tested values in both the rod and the off-rod directions. Studied are the elastic behavior, temperature distribution, and thermo-elastic behavior of a kick motor nozzle composed of carbon/carbon SRC as a throat part. The elastic deformation of the nozzle composed of 3D carbon/carbon SRC shows asymmetry in a circumferential direction. However, 4D carbon/carbon SRC nozzle shows uniform deformation in the circumferential direction. Stress concentration in connecting parts of the kick motor nozzle is ultimately high due to the high temperature gradient in each connecting part. The thermo-elastic deformations of both the 3D and the 4D SRC nozzles are uniform in the circumferential direction due to the isotropy of CTE of each SRC. The deformation of the 3D SRC nozzle is a slightly smaller than that of the 4D SRC nozzle in the nozzle throat, which is favorably effective on rocket thrust. The circumferential stress is the most critical component of the kick motor nozzle. The 4D SRC nozzle having 1,1,1,1.7 diameters in each direction has the smallest circumferential stress among several SRC nozzles.

서지기타정보

서지기타정보
청구기호 {DAE 02004
형태사항 xi, 117 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 좌표변환 행렬과 연성상수행렬. - B, 기지부분의 파손판단식
저자명의 영문표기 : Jae-Seok Yoo
지도교수의 한글표기 : 김천곤
지도교수의 영문표기 : Chun-Gon Kim
수록잡지명 : "Prediction of mechanical behavior of spatially reinforced composites for kick motor nozzle". Composite structures, v.54, pp.57-65 (2001)
수록잡지명 : "공간적으로 보강된 복합재 노즐의 열탄성 해석". 한국항공우주학회지, v.29 no.7, pp.41-48 (2001)
학위논문 학위논문(박사) - 한국과학기술원 : 항공우주공학전공,
서지주기 참고문헌 : p. 105-110
주제 다방향으로 입체 보강된 복합재료
강성예측
강도예측
킥모터 노즐
열탄성해석
Spatially Reinforced Composites
Stiffness Prediction
Strength Prediction
Kick Motor Nozzle
Thermo-elastic Analysis
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